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Molecules 2011, 16(1), 790-817; doi:10.3390/molecules16010790
Review

Phage Display: Selecting Straws Instead of a Needle from a Haystack

1,* , 2, 1,3 and 1
Received: 9 December 2010; in revised form: 12 January 2011 / Accepted: 17 January 2011 / Published: 19 January 2011
(This article belongs to the Special Issue Phage Display of Combinatorial Libraries)
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Abstract: An increasing number of peptides with specific binding affinity to various protein and even non-protein targets are being discovered from phage display libraries. The power of this method lies in its ability to efficiently and rapidly identify ligands with a desired target property from a large population of phage clones displaying diverse surface peptides. However, the search for the needle in the haystack does not always end successfully. False positive results may appear. Thus instead of specific binders phage with no actual affinity toward the target are recovered due to their propagation advantages or binding to other components of the screening system, such as the solid phase, capturing reagents, contaminants in the target sample or blocking agents, rather than the target. Biopanning experiments on different targets performed in our laboratory revealed some previously identified and many new target-unrelated peptide sequences, which have already been frequently described and published, but not yet recognized as target-unrelated. Distinguishing true binders from false positives is an important step toward phage display selections of greater integrity. This article thoroughly reviews and discusses already identified and new target-unrelated peptides and suggests strategies to avoid their isolation.
Keywords: phage display; target-unrelated peptides; decoy phage display; target-unrelated peptides; decoy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Vodnik, M.; Zager, U.; Strukelj, B.; Lunder, M. Phage Display: Selecting Straws Instead of a Needle from a Haystack. Molecules 2011, 16, 790-817.

AMA Style

Vodnik M, Zager U, Strukelj B, Lunder M. Phage Display: Selecting Straws Instead of a Needle from a Haystack. Molecules. 2011; 16(1):790-817.

Chicago/Turabian Style

Vodnik, Miha; Zager, Urska; Strukelj, Borut; Lunder, Mojca. 2011. "Phage Display: Selecting Straws Instead of a Needle from a Haystack." Molecules 16, no. 1: 790-817.



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